A022718 Expansion of Product_{m>=1} (1+m*q^m)^-26.

1, -26, 299, -2002, 8827, -29406, 93184, -320996, 1039753, -2889432, 7786272, -22551126, 62828467, -158350636, 399157837, -1050026250, 2646932132, -6320963454, 15276388101, -37320661638, 88295712804

Offset

0,2

Links

G. C. Greubel, Table of n, a(n) for n = 0..1000

Mathematica

With[{nmax = 50}, CoefficientList[Series[Product[(1 + k*q^k)^-26, {k, 1, nmax}], {q, 0, nmax}], q]] (* G. C. Greubel, Jul 20 2018 *)

Prog

(PARI) m=50; q='q+O('q^m); Vec(prod(n=1, m, (1+n*q^n)^-26)) \\ G. C. Greubel, Jul 20 2018

Crossrefs

Sequence in context: A125414 A208600 A010831 * A014472 A000498 A066912

Adjacent sequences: A022715 A022716 A022717 * A022719 A022720 A022721

Keyword

sign

Author

N. J. A. Sloane

Status

approved